I shout, absorbing loud echo returning in part of glacier (3,4)

'part of glacier' is the definition.
(an ice fall might be part of a glacier)

'i shout absorbing loud echo returning' is the wordplay.
'shout' becomes 'call' (synonyms).
'absorbing' indicates putting letters inside.
'loud echo' becomes 'fe' (I can't justify this - if you can you should give a lot more credence to this answer).
'returning' shows that the letters should be reversed in order.
'fe' reversed gives 'ef'.
'call' placed around 'ef' is 'cefall'.
'i'+'cefall'='ICE-FALL'

'in' acts as a link.

Can you help me to learn more?